Robin Williams died by suicide on August 11, 2014, at his home in Paradise Cay, California. He was 63 years old at the time. The official cause of death was suicide by hanging (asphyxiation).
After his death, medical examinations revealed that he had been suffering from Lewy body dementia, a severe neurological disease that had not been fully diagnosed during his lifetime. The condition significantly affected his brain and behavior in his final months.
The Illness Discovered After His Death
An autopsy later confirmed that Robin Williams had Lewy body dementia (LBD). This condition affects the brain and can cause symptoms such as:
- memory problems
- confusion
- anxiety
- sleep disturbances
- hallucinations or paranoia
Doctors described the disease found in Williams’ brain as one of the most severe cases they had seen.
Before his death, Williams had also been diagnosed with Parkinson’s disease in 2014. However, the Parkinson’s diagnosis did not fully explain the symptoms he was experiencing. The autopsy later showed that Lewy body dementia was the underlying condition affecting his neurological health.
Mental and Emotional Struggles

During the final year of his life, Robin Williams experienced several health changes. Reports from family members and medical professionals described symptoms such as:
- increasing anxiety
- insomnia
- confusion and memory issues
- sudden emotional distress
These symptoms are now understood to be connected to Lewy body dementia, which can cause severe psychological and cognitive changes.
Williams had also spoken publicly in earlier years about struggles with depression and substance abuse, although he had been sober for several years before his death.
What Happened to Robin Williams
On August 11, 2014, Robin Williams was found dead in his home. Authorities later confirmed that he had died by suicide.
Following the investigation and medical examination, the discovery of Lewy body dementia helped explain many of the severe neurological symptoms he had experienced shortly before his death.
Today, his passing is often discussed in connection with raising awareness about mental health and neurological diseases.
FAQs
Why did Robin Williams commit suicide?
Robin Williams died by suicide in 2014. An autopsy later revealed that he had been suffering from Lewy body dementia, a severe neurological disease that affected his brain and behavior.
What disease did Robin Williams have?
He had Lewy body dementia, which was confirmed after his death. He had also been diagnosed with Parkinson’s disease earlier in 2014.
What happened to Robin Williams before he died?
In the months before his death, Williams experienced symptoms including anxiety, insomnia, confusion, and memory problems, which were later linked to Lewy body dementia.
When did Robin Williams die?
Robin Williams died on August 11, 2014, at the age of 63.



